/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package a.annotation.proguard.classfile.attribute.annotation;

import proguard.classfile.*;
import proguard.classfile.attribute.annotation.visitor.ElementValueVisitor;
import proguard.classfile.visitor.ClassVisitor;

/**
 * This ElementValue represents a class element value.
 *
 * @author Eric Lafortune
 */
public class ClassElementValue extends ElementValue {
    public int u2classInfoIndex;

    /**
     * An extra field pointing to the Clazz objects referenced in the type name string. This field is filled out by the
     * <code>{@link
     * proguard.classfile.util.ClassReferenceInitializer ClassReferenceInitializer}</code>. References to primitive
     * types are ignored.
     */
    public Clazz[] referencedClasses;

    /**
     * Creates an uninitialized ClassElementValue.
     */
    public ClassElementValue() {}

    /**
     * Creates an initialized ClassElementValue.
     */
    public ClassElementValue(int u2elementNameIndex, int u2classInfoIndex) {
        super(u2elementNameIndex);

        this.u2classInfoIndex = u2classInfoIndex;
    }

    /**
     * Returns the class info name.
     */
    public String getClassName(Clazz clazz) {
        return clazz.getString(u2classInfoIndex);
    }

    /**
     * Applies the given visitor to all referenced classes.
     */
    public void referencedClassesAccept(ClassVisitor classVisitor) {
        if (referencedClasses != null) {
            for (int index = 0; index < referencedClasses.length; index++) {
                Clazz referencedClass = referencedClasses[index];
                if (referencedClass != null) {
                    referencedClass.accept(classVisitor);
                }
            }
        }
    }

    // Implementations for ElementValue.

    public char getTag() {
        return ClassConstants.ELEMENT_VALUE_CLASS;
    }

    public void accept(Clazz clazz, Annotation annotation, ElementValueVisitor elementValueVisitor) {
        elementValueVisitor.visitClassElementValue(clazz, annotation, this);
    }
}
